First of all you need to learn how to form the Preterit for both regular and irregular verbs.
-ar (hablar)
yo hablé, tú hablaste, él/ella/ usted habló,
nosotros, -as hablamos, vosotros, -as
hablásteis, ellos/ellas/ustedes hablaron

NOTE; the accents, color-code the endings so they stand out; that makes them easier to memorize.

Some irregulars that I see you have.
ir/ser (note that they will be identical, so usually it's the "a" that goes with "ir" that will identify that one.)
yo fui, tú fuiste, él/ella/usted fue, nosotros, -as fuimos, vosotros, -as fuisteis, ellos/ellas/ustedes fueron

Note: these are unstressed, or, in other words, have no accent marks.

Now, look at the subject (which is not stated above) = yo, tú, él, ella, usted, nosotros, -as, vosotros, -as, ellos, ellas, ustedes) in the Present Tense and shift that to the Preterit. Be SURE it is the same subject!

write 9 sentences about financial planning. Each sentence must demonstrate a different verb tense (so, only use each tense once). For each sentence, identify the subject, the verb, and the verb tense demonstrated. In order to receive …

Define verb tense. Write a sentence that has a simple present tense verb. Rewrite it, changing the verb to simple past tense, simple future tense, each of the perfect tenses, and each of the progressive tenses.